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Ji Sung Nam

TennisJack analysis

Ji Sung Nam currently has a useful TennisJack sample of 31 completed matches, with a 51.6% win rate in the loaded match history. The recent form line is 3-7 across the latest 10 completed matches.

Latest rank #128
M
Matches31Completed matches
%
Win rate51.6%Across all matches
F
Latest form3-7In latest 10 matches
Performance metrics
Hold Base72.7%
Break Pressure34.7%
Latest form (10 matches)
3-7
W Oldest L 2 L 3 L 4 W 5 W 6 L 7 L 8 L 9 L Latest
Surface profile
Hardcourt outdoor 20 matches · 55.0% WR
South Korea flag
CountrySouth KoreaCountry profile
PlayRightRight-handed
Highest Rank#236Singles career high
Age / Birthday32Born 15 Aug 1993
Profile intelligence

Ten signals worth watching.

Built from 31 completed TennisJack matches: form, surface, odds, pressure and close-set behavior. The full match log stays below for audit.

01

Player DNA

Quick fingerprint from starts, service base, return bite and decider exposure.

Strong starter Break-heavy player Stable server
Set 1 punch64.5%
Service shield72.7%
Return bite34.7%
Decider risk35.5%
02

Favorite / Underdog Split

How the player behaves when priced as market favorite versus outsider.

Favorite 75.0% 9-3 - 12 matches Avg odds 1.31 | 1+ set 100.0%
Underdog 36.8% 7-12 - 19 matches Avg odds 2.95 | 1+ set 52.6%
03

First Set Personality

Shows whether the player starts cleanly, breaks first, or survives early pressure.

Set 1 win64.5%
Breaks first S156.7%
Broken first S143.3%
Recovers S130.8%
04

Break Pressure Profile

Return damage versus service leakage, built from set-level break counters.

Avg breaks3.58
Avg broken2.87
Balance0.71
Clean service matches12.9%
3+ breaks produced71.0%
Set 2 win41.9%
05

Clean Win / Comeback Index

Separates smooth 2-0 wins from matches where the player had to repair damage.

56.2%Clean 2-0 share among wins
Clean 2-0 wins9
Comeback signals15
Lost set 1, won match1
Comeback index48.4%
06

Surface Edge

Where the profile is most trustworthy and where the win rate really travels.

Primary surfaceHardcourt outdoor
Primary record11-9
Primary WR55.0%
Best surfaceHardcourt indoor 62.5%
Hardcourt outdoor11-955.0%
Hardcourt indoor5-362.5%
Clay0-30.0%
07

Odds Value Pulse

Shows whether the player wins as expected or creates value at outsider prices.

Avg win odds1.69
Avg loss odds2.99
Biggest win odds2.75
2.00+ odds WR31.2%
2.00+ sample16
Odds sample31
08

Decider Profile

How often matches become complicated, and whether the player survives the third set.

Three-set share35.5%
Decider record5-6
Set 3 win45.5%
After losing S19.1%
09

Close Set Risk

Tie-break and 7-5 / 7-6 pressure profile, useful for spotting fragile edges.

Close sets10-21
Close-set WR32.3%
Tie-breaks4-4
Matches with tight set21
10

Momentum Trend

Compares the latest 5 matches with the previous 10 so form shifts are visible immediately.

Cooling down · 4 losses running
W oldest L 2 L 3 L 4 W 5 W 6 L 7 L 8 L 9 L latest
Latest 5 1-4 20.0% WR
Trend delta -30.0% latest vs previous sample
Match log

All Ji Sung Nam matches in the TennisJack sample.

Scan date, tournament, surface, players, odds, final score, result and service-return indicators from completed matches.

Open Player Research
Loss
31.05.2026Round 14
Challenger ProstejovClay
Jan Kumstat
vs
Ji Sung Nam
1.20
4.33
6-4 6-4
Hold
70.0%
Break
11.1%
Loss
12.04.2026Round 14
Challenger BusanHardcourt outdoor
Ji Sung Nam
vs
Marat Sharipov
2.75
1.40
3-6 2-6
Hold
50.0%
Break
11.1%
Loss
31.03.2026R32
Challenger MiyazakiHardcourt outdoor
Ji Sung Nam
vs
Braden Shick
2.25
1.57
4-6 2-6
Hold
44.4%
Break
22.2%
Win
30.03.2026Round 19
Challenger MiyazakiHardcourt outdoor
Ji Sung Nam
vs
Yuta Kikuchi
1.57
2.25
6-4 6-4
Hold
90.0%
Break
30.0%
Win
29.03.2026Round 14
Challenger MiyazakiHardcourt outdoor
Takuya Kumasaka
vs
Ji Sung Nam
1.62
2.20
2-6 4-6
Hold
77.8%
Break
55.6%
Loss
25.01.2026Round 14
Challenger Phan Thiet QualHardcourt outdoor
Marek Gengel
vs
Ji Sung Nam
1.30
3.40
6-3 6-4
Hold
66.7%
Break
10.0%
Loss
04.01.2026Round 14
Challenger NonthaburiHardcourt outdoor
Ji Sung Nam
vs
Kokoro Isomura
1.50
2.50
6-1 6-7 4-6
Hold
78.6%
Break
31.2%
Loss
17.11.2025Round 19
Challenger YokohamaHardcourt outdoor
Igor Marcondes
vs
Ji Sung Nam
1.67
2.10
6-4 6-4
Hold
50.0%
Break
30.0%
Win
16.11.2025Round 14
Challenger YokohamaHardcourt outdoor
Nathan Trouve
vs
Ji Sung Nam
3.00
1.36
0-6 1-6
Hold
100.0%
Break
85.7%
Loss
11.11.2025R32
Challenger KobeHardcourt indoor
Hynek Barton
vs
Ji Sung Nam
1.40
2.75
6-7 6-4 7-6
Hold
76.5%
Break
15.8%
Win
10.11.2025Round 19
Challenger KobeHardcourt indoor
Duje Ajdukovic
vs
Ji Sung Nam
1.33
3.25
4-6 7-5 4-6
Hold
81.2%
Break
25.0%
Loss
04.11.2025R32
Challenger TaipeiHardcourt indoor
Ji Sung Nam
vs
Jurij Rodionov
5.50
1.14
6-2 6-7 2-6
Hold
71.4%
Break
26.7%
Win
03.11.2025Round 19
Challenger TaipeiHardcourt indoor
Ji Sung Nam
vs
Takeru Yuzuki
1.40
2.75
7-6 6-1
Hold
100.0%
Break
20.0%
Win
02.11.2025Round 14
Challenger TaipeiHardcourt indoor
Ji Sung Nam
vs
Ren Nakamura
1.10
6.50
6-1 6-2
Hold
100.0%
Break
57.1%
Loss
27.10.2025Round 19
Challenger SeoulHardcourt outdoor
Ji Sung Nam
vs
Uisung Park
1.91
1.80
4-6 1-6
Hold
25.0%
Break
33.3%
Loss
25.08.2025Round 19
Challenger ZhangjiagangHardcourt outdoor
Tsung-Hao Huang
vs
Ji Sung Nam
1.62
2.20
6-2 6-4
Hold
44.4%
Break
22.2%
Loss
03.08.2025Round 14
Challenger Grodzisk MazowieckiHardcourt outdoor
Ji Sung Nam
vs
Rafael Jodar
5.00
1.14
0-6 3-6
Hold
42.9%
Break
0.0%
Loss
05.06.2025
ITF M25 ChangwonHardcourt outdoor
Ji Sung Nam
vs
Evan Zhu
1.25
3.75
6-2 4-6 4-6
Hold
57.1%
Break
42.9%
Win
01.06.2025
ITF M15 DaeguHardcourt outdoor
Ji Sung Nam
vs
Uisung Park
1.83
1.83
6-1 6-2
Hold
85.7%
Break
75.0%
Win
31.05.2025
ITF M15 DaeguHardcourt outdoor
Ji Sung Nam
vs
Jeamoon Lee
2.10
1.67
1-6 6-2 6-3
Hold
58.3%
Break
50.0%
Win
29.05.2025
ITF M15 DaeguHardcourt outdoor
Ji Sung Nam
vs
Jay Friend
2.50
1.50
6-3 6-1
Hold
75.0%
Break
75.0%
Win
22.05.2025
M15 AndongHardcourt outdoor
Ji Sung Nam
vs
Hoyoung Roh
1.50
2.50
6-1 4-6 6-0
Hold
81.8%
Break
58.3%